Cheap flights from Seattle to Ontario (SEA - ONT)

Flight FAQs

From Seattle to Ontario

What airports do I use to fly from Seattle to Ontario?

Booking a flight from Seattle/Tacoma Intl (SEA) to Ontario (ONT) is your only option if you wish to fly from Seattle to Ontario. On a typical day, there are 10 flights from Seattle/Tacoma Intl to Ontario, all of which are around 2h 25m for a nonstop flight. You can also purchase a plane ticket from 9 airlines when you book a flight from Seattle/Tacoma Intl to Ontario.

Which airlines flying from Seattle/Tacoma Intl to Ontario have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like Alaska Airlines, United Airlines, and Delta flying from Seattle/Tacoma Intl to Ontario have implemented new flexible cancellation policies.

Are flight prices decreasing from Seattle to Ontario due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Seattle and Ontario for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Seattle to Ontario for under $100 on Cheapflights?

Yes, there are multiple flights from Seattle to Ontario for under $100. The cheapest flight booked recently is on Multiple Airlines for just $94, but on average you can expect to pay $115.

Are there nonstop flights from Seattle to Ontario for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Seattle to Ontario under $200. A good price for a nonstop flight from Seattle to Ontario is less than $143.

Are there last-minute flights available from Seattle to Ontario for under $100?

There are currently 20+ open flights from Seattle to Ontario within the next 7 days for less than $100.

How popular is this Seattle to Ontario flight route?

This flight path from Seattle/Tacoma Intl to Ontario was viewed by 170 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

What are the cheapest airlines flying from Seattle to Ontario round-trip?

Our cheapest airline available from Seattle to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $104 on this airline. An additional option worth looking into is Alaska Airlines, starting at $118. Frontier is priced at 49% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Seattle to Ontario one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $45. Users have also found prices from $48 and $78 on Alaska Airlines and Delta, respectively.

What are the most reliable airlines from Seattle to Ontario?

Before booking your flight to Ontario from Seattle, check out the most reliable airlines to get you to your destination on time: Virgin Atlantic (100%), KLM (95%), SkyWest Airlines( 92%).

What are the most popular airlines that fly from Seattle to Ontario?

Major Airline, American Airlines and Alaska Airlines are the most popular airlines when flying from Seattle to Ontario.

What are the cheapest flights from Seattle to Ontario?

Looking at all options, your cheapest flight can be booked for $78. While the most popular route (Seattle/Tacoma Intl - Ontario) can be booked for $119 on average our data indicates $454 when flying from Seattle to Ontario